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Instruction Manual
IM-106-880C, OI
September 2009
3-11
Hazardous Area OCX 8800
Zero Flow - Length of time COe zero gas flows. Range is 120 to 600
seconds. Default is 120 seconds.
Zero Purge - Length of time after COe zero is complete before
oxygen/combustibles readings are considered valid. Range is 60 to
180 seconds. Default is 60 seconds. Total duration of this function is
flow time plus purge time.
Zero Tracks - Determines if the analog output signals track or hold
during the function. Valid choices are None, Both, COe, and O2.
Zero Update - Determines if the COe calibration constant is updated at
the end of the function. Valid choices are Yes and No. A Yes choice will
cause the COe calibration constant to update.
Configuring the Calibration Tolerance Feature with the Field
Communicator - Fieldbus
1. Use the 375 Field Communicator or AMS software to access the
Fieldbus menu.
2. From the TRANSDUCER block menu, select COe ZERO.
3. From the COe ZERO menu, select the functions as follows:
COe Zero Enable - Select "Yes" or "No" to enable or disable this
feature.
COe Zero Interval - Length of time between COe zero events. Range
is 60 to 480 minutes. Default is 60 minutes.
COe Zero Duration - Length of time COe zero gas flows. Range is 120
to 600 seconds. Default is 120 seconds.
COe Zero Purge Time - Length of time after COe zero is complete
before oxygen/combustibles readings are considered valid. Range is
60 to 180 seconds. Default is 60 seconds. Total duration of this
function is flow time plus purge time.
COe Zero Output Track - Determines if the analog output signals track
or hold during the function. Valid choices are None, Both, COe, and O2.
COe Zero Update - Determines if the COe calibration constant is
updated at the end of the function. Valid choices are Yes and No. A
Yes choice will cause the COe calibration constant to update.
Configuring the COe Zero Feature with the LOI
1. Use the "Z" pattern to enter the LOI menu tree.
2. From the SYSTEM menu, select Input/Output.
3. From the Input/Output menu, select COe Zero. Select the functions as
follows:
COe Zero Enable - Select "Yes" or "No" to enable or disable this
feature.
COe Zero Intrvl - Length of time between COe zero events. Range is
60 to 480 minutes. Default is 60 minutes.
COe Zero Flow - Length of time COe zero gas flows. Range is 120 to
600 seconds. Default is 120 seconds.